Telephone receiver



Feb. 8, 1927. A. PIHL TELEPHONE RECEIVER Original Filed Oct. 25, 1922 2 Sheets-Sheet 1 INVENTOR fllbertltfii.

BY. I 3 i/t/M/ Way/M iTTORNEY Feb. 1 27.

9 A. PIHL TELEPHONE RECEIVER Originl Filed Oct 25, 1922 2 Sheets-Sheet 2 INVENTOR ilfiertpkl.

ATTORNEY Reissue'tl Feb. 8, 1927..

UNITED STATES, VPATENTHOFFIVCE.

ALBERT PIHL, OF MURRAY. UTAH. ASSIGNOR TO HOLLIDAY RADIO & MANUFAC- TURING COMPANY, AUCRPORATION OF UTAH.

TELEPHONE RECEIVER.

Original No. 1.563.787jdated December 1. 1925. Serial No. 586.729. filed October 25. 1922. Application tor reissue filed September 7.

' My invention relates to an improved telephone receiver adapted for general use but. particularly for wireless telephony. It is preferably of what is known as the watch case type and is very simple and compact in structure.

One object of the invention is to provide a novel means for mounting the armature :so that it will be very sensitive and require slight current to operate.

Another obiect is to provide a simple compact arrangement of polo pieces and coils which will be ve y efficient.

Other objects will be apparent from the i following detiiled description arid appended claims.

In the drawings: 2 i

Figure 1 is a face view of the rcccivelwith the cover or cap removed.

Figure 2 is-a bottom' plan view of the receiver removed from the usual inclosing case. Figure 3 is a side elevation.

Figure 4 is an elevation taken at right angles to Figure 3.

Figure 5 is a view of the main parts of the receiver disassembled. Figure 6 is an end view of the spool upon which the coils are Woun Figure 7'is a View at right angles to Fig- 80 ure,6 and partly in section.

, Figu1'e'8 shows a perspective view of an alternative mounting for tho armature.

Figure 9 isa sectional view of the same. showing the armature in position. 86 Figure lO'is a bottom plan view of an alternative form of construction embodying onlyone coil.

Figure 11 is a diagrammatic view of the winding of the twofcoilsand their relation to the armature.

. To a. ring 1 of suitable material is secured a permanent magnet 2 of the general .torm' shown in Figure 5. Bolts 3 pass through the ring and magnet and are provided with.

- nuts 4 for securing the parts together. Two

ole pieces 5 and 6-.are providedavtthhol es i and 8 respectively through which a's'sthe 'bolts t3. A tuning spring or memcr 9' is providetlqvith .a hole 10 through which 1926. Serial No. 134.092.

passes one of the bolts 3. It will be seenihereforc that the two bolts 3 with their nuts 4 hold in position substantially all of the parts of the receiver.

Three pieces of fibre 11. 12 and 13 of general elliptical shape each have an oblong opening extending through the same. the edges of which openings are enlarged and provided with wooden pins 14 and 15. The fibre pieces 11. 12 and 13 and the pins 14 and'15 on which they'are fitted constitute a spool orbobbin for the coil or coils. A thin strip of suitable metal 16 lies along theinner sides of the wooden pins and is folded upon itself at 18 to overlap the outer ends of the pins. while at the inner ends, the ends of the'strips are bent over as shown at 19. The three fibre strips provide for two coils. one c0il20 lying between the strips 11 and 12, and the other coil'21 lying between the strips 12 and 13. These coils are wound in opposite directions, see Figure 11.. The use of a spool of this type obviates the necessity for other insulation. and produces a light and cheap construction. which nevertheless is very eflicient. The pins 14 and 15 and strips 16 constitute a. holder fori'the fibre pieces 11. 12 and 13 and serve as a carrier for the armature.

It should also be noted that it is preferable to shape the backs fi -6* of the pole pieces 5 and 6 to conform to the shape of the coils, not only to aid in preventing displacement of the spool or bobbin but. also to .increasethe efficiency of the device by giving a strong pull to the armature.

The pole piece Ghas sides bent at substantially right angles to form parts 22 that extend on the sides of the spool. Notches 23 are cut out of each part 22 and in these engage the wooden pins 14 and 15 when the parts are assembled. The pole piece 7 is similarly formed. The sidepieces of the pole piece 6 do not quite contact with the similar arts of the pole piece 7 but spacev is left between them for the armature. Pieces of mica one oi which is shown in Figure 5 at 24 lie between the. pole pieces.

and the 00118.

- phragm.

The armature has projections 26 at its sides near the middle which engage openings or depressions formed in the metal strip 16 near the middle of the spool, thus pivoting the armature to move freely. A projection 27 at the inner end of'the armature is connected bya' bolt 28 ,to the diaphragm 29, a nut 30 and washer 31 being employed to hold the bolt and diaphragm in engagement.

By pivoting the armature directly to the spool or bobbin, i. e. to the armature carrier 14 15 and 16 in the mannerdescribed, dau-, gcr of electrical contact being produced between the armature and coil windings adja: cent thereto is reduced to the minimum.

The tuning spring 9 carried atone end by the bolt 3 has a cut out 32 thatfits about the I wooden pin 15 and another cutout 33 adja:

cent the. bolt 28, and the inner end of this spring member 9 is engaged by'the dia- Accidental and unintended movements of. the diaphragmare thus prevented.

- Split binding posts 34 are provided for the leading in wires. These'are held inplace by screws36 as indicated in Figure 1 which pass through the ring 1. All of the above ,parts may be included in a suitable case of,

' sensitive.

any desired type which will .be provided with apertures for the leadingin wires.

'* The diagrammatic view of Figure. 11 shows howthe armature which is pivoted on the line ab is subjected to thetuning influence ofthe two coils which are wound in opposite directions but so that their influence is onthe same face of the armature. In this manner thereeeiver is rendered more FigurelO discloses a modification in which a single coil 37ma'y be employed instead of the two coils shown in the first form. In' this form two fibre pieces 11 and 13 only are necessary. Otherwise. thetwo embodiments of my invention are substantially the same.

Flgur'es 8 and 9 disclose an alternative manner of pivfotin'g the armature".- In this form the central fibre member 12 is provided With an enlarged central aperture 38.

In one side otthe disc'is inserted a metal member 39 and a. similar metal-piece 40 (with a lip .41 serving as engaging means for movement) is slidably mounted in'a pas-' sagewayin the'dise. The member 39 has projections 42 at its corners, and the mem- 7 her 40 has similar projections 43 at its corners which come into contact with the projections 42 when the member 40 is inserted" into position. The armature 25has notches in its edges intowhich fit the'proieetions when the'member 40 is pushed into contact Twith the member 39. This provides a freely movingpivotatsupport for the armature.

It is obvious'that 'otlnar'means maybe provided for pivoting the-armature. *Also size,

proportion and form inav be varied without in any way departing from the spirit of my invention which is to be regarded as limited only by the scope of the appended claims.

lclaim as my invention:

1. A telephone receiver comprising a ring member, a. U-shaped permanent magnet carried by said member, pole pieces attached to the ends of the magnet and extending toward each other, a'spool retained in position-by said pole pieces, two oppositely wound coils on said spool, an opening through the center ofsaid spool, an armature pivoted to .the spool Within said opening, a diaphragm can l'lQd by the ring member, and means con-' necting one end of the armatnre'to the dia phragm.

2. A telephone receiver comprising a ring member, a permanent, magnet carried by said member and having free ends, pole pieces attached tothe ends of the magnet and having freeen'ds which are U-shaped, a spool supported between the free ends of the pole pieces, opposite ly wound 'coils on said spool, an opening through thecenter 'ot the spool, an armature pivoted to the spool in said opening a diaphragm, and means connecting the armature to the diaphragm.

3. A telephone receiver comprising a ring member, a U-ohaped permanent magnet carried bysaid 'membernnd having vtree ends, pole pieces attached .to the ends of the magnet and having free ends that are U-shaped, a spool supported between the free ends of thepole pieces, a'coil on said spool, said pole pieces having their backs shaped to conform to the shape of the coils andthe spool edges in contact with said pole pieces, an armature pivotally supported directly by said spool, a diaphragm, and means connecting the armature to the diaphragmi 4. A telephone receiver comprising a rinj imember, a permanent magnet carried the'riiby, pole ipieces attached to said magnet and having ee ends extending toward each other, a spool supported between the free ends of the polepieces, oppositely wound coils on said spoof, anarmature pivotall i supported directly by said spool, a dia phragm, and n ean's connecting the armature to the diaphragm.

In a telephone receiver, a spool for coils comprising a plurality of fibre discs pro vided with central openings, wooden pins at the edges of sajd openings, and a metal strip arranged to substantiallv cover the endsand inside faces of the wooden pins.

(i, In a telephone receiver, a plurality of fibrediscs provided with central openings, wooden pins at the edges of said opening, a metal strip arranged'at the innci.= faces of the wooden pins, and an armature pivotally supported by said metal strip;

7. Tu a telephone receiver. a spool for coil" comprising fibre liscs provided with cent: openings, spaced non-metallic members tinned within strip covering metallic incnibt and a metal inner faces at the non- S. In a telepl' no receiver. a supporting member for an a. mature comprising a i'ibre disc having a central opening and notches and relatively adjustable members carried hjv said di e. and projecting into said opening and providednvith projecting corners adapted to engage thenotches 1n the armature.

SQA telephonereceivercomprising a U shaped permanent magnet, pole piercev at-' tached to the ends of the magnet and extending toward each other, a )ool retained in position by and pole pieces, oppositely wound coils on said spool, .an opening through the center of said spool,- an armature pivoted within said opening 50 that one coil overlies one part of the armature and the other coil the other part, :1 diaphragm, andniean connecting one end of the armature to the diaphragm,

10. A telephone receiver comprising a permanent magnet having separated tree ends. pole pieces attached. to the ends of the magnet and having i'rec U-nhaped ends, a spool supported hetivecn the free ends of the pole pieces, oppoeitclv wound coils on said S'Pflfll. an opening through the center of the spool, an armature pivoted in said opening 510 that one coil overlies one part of the armature and the other coil the other part, a diaphragm, and means connecting the armature to the diaphragm.

11. A telephonereceivcr comprising a ring member, a U-shapcd 'ierniancnt magnet carried by said. member and having: free ends, pole pieces attached to the ends of the magnet. Faid pole picccs having free ends that are Ushaped, said pole pieces having" car for mounting said pole pier-ca on the magnet and having connecting; portions hetxvecn said ears and aaid U-shaped free ends,

spool having: flat upper and lower edge portion. and curved aide nortions supported hetween the. ends of the pole piccca. Paid pole piece; having their backs and Said connecting portions shaped to conform to the Fhapc oi the =pool edema in contact with Faid pole miccea. a coil on said spool. an arn'iatnre pivotallv supported directly by said spool. a diaphra g'z'n, and means eonncctiinr the armature lo the diaphragm.

l2. ln telephone rcccii ers. a support. a generally Li-shapczl permanent magnet an cured to the support and l ring itn ends which spaced apart. pole piecw'secured at the ends at the harem-t l arn on the Face or po i'tc to the support. Hlilfi pole pieces: can tendin onard one nnoihtf anal at sc -F e l illli" ics in ihe l l i'cction' of the,

t t. length of the lPjI of the magnet. (o l: polo niece comp. an ear in" whi h it a l to the magnet, a U-rhapwl l'll-fl :.2

mired a carved portion connecting: the ear with the U-shapcd end, a spool with coil held between the U-shaped ends of the pole pieces said pole pieces having their curved portiom ahapcd'to conform to the adjacent outline of the apool, said apool having a central opem ing and an armature pivotally"mounted to the apool. Within said opening, a diaphragm carried by the base and a rod connecting the diaphragm to the armature.

13. In telephone receivers. a support, a gn ncrally U-Fhapcd permanent magnet s ecured to the support and having its ends \videh spaced apart, pole pieces secured at, the ends of the magnet legs on the face opposite to the support. said pole pieces extending toward one another and at substantially right angles to the direction'of the length of the legs of the magnet, each pole piece concprising an car by which it is secured to the magnet, a U-sha 'ied end and a curved portion connecting the ear with the U-shaped end, a spool with coil held between the U-shaped end? of the pole pieces, said pole pieces having their curved portions shaped to conform to the adjacent outline of the spool, said apool having a central opening and an annature pivotally mounted, to the spool Within vaaid opening. a diaphragm carried by the base and a rod connecting the diaphragm to the armature, said ears lying in substantially the same plane and in substantial alignment with said central heat-in 14'. In telephone receivers, a support. agent-rally Ushaped permanent magnet secured to the support-and:havingi its ends Widely spaced apart, pole pieces secnred at the ends of the maemet legs on the face opposite to the aupport. said pole pieces extending toward one another and at substantially right. angles to the direction of the length of the legs of the magnet. each pole piece comprising an ear hy which it is secured to the magnet, a U-shapcd end and a. curved por' tion connecting: the car with the U-shaped end. a spool with coil held between theU- ahaped we of the pole pieces, said pole pieces having their curved portions shaped to conform to the adjacentoutline ofthe spool, said spool having a central opening: and an arn'iatnro pivotally mounted to the spool within said opening, a diaphragm carried by the base and a rod connectim the diaphragm to the arma ure. said spool compriaing' a central structure conatitutii'ig an armature carrier and side pieces mounted on said central structure. said armature being pivoted in and to said central vetructnre.

11in telephone receivers, a support. a ,n'ancrally U-shaped permanent; magnet ac- -urcd to the support and having its coda widely spaced apart, pole pieeca SttfllT'Gtl at l in: toward one another and at substantialcinh: of the magnet legs n the i'ace op-' noaite to the support. said polo pieces extend- 1y right angles to the direction of the length of the legs'of the magnet, each pole piece comprising an ear by which it is secured to the magnet, a U-shaped end and a curved portion connecting the ear with the U-shaped end, a spool with coil held between the U- shaped ends of the pole pieces, and said pole pieces having their curved portions shaped to conform to the adjacent ontline'of the 10 spool, said spool having a central opening and an armature pivotally mounted to the spool within said opening, a diaphra carried by the base and a rod conneetlng the diaphragm to the armature, said spool comprising'a central structure constituting an ari'nature carrier and side pieces mounted on said central structure, said armature being pivoted in and to said central structure.

' ALBERT PIHL. 

